// lowlevel/SerialNumbers.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.

public class SerialNumbers {
    private volatile int serialNumber = 0;

    public int nextSerialNumber() {
        return serialNumber++; // Not thread-safe
    }
}
